Battery-plate envelop



c. c. CARPENTER.

BATTERY PLATE ENVELOF. APPLICATION HLD APR. I6, l9l3\ RENEWED MAY 3.1919- l Mjlw Patented Dec. 23,1%).

2 SHEETSSHET 1.

C. C. CARPENTER.

BATTERY PLATE ENVELOP.

APPLICATTON man APH. I6y |913. ,HENEWED MAY 8,1919.

Patened Dec. 23,1919

' 2 SHEETS-SHEET 2.

Sil

mun-nnew Yonnasslenon. er Missive BATTERY-PLATE ENVELOP.

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Application filed April 16, will, Serial No. 761,5

To nl? wlw/n it may concern? Be it known that I, CAMPnELL C. CAR- rnn'ren, a citizen of the. United States, residing at Niagara Falls, in the county of Niagara and `State of New York, `have invented new and useful Improvements in Battery-Plate Envelope, of which, the ioL lowing;- is a full, clear, conciseand exact description, reference being had to the ac companyingdrawing, forming a part of this specification.

rllhis invention, relates to improvements in battery plate envelops.

In the @eration-of the standard lead battery plates many diiiiculties have, been encountered on account of the disintegration oi' the plates due to the shedding ol the active material. Attempts have. been made lo provide inclosing envelops which will cfl'ectively hold the active material in place. Such envelops have been generally unsuccesslul due to the tact that the protective envelop does not' respond to the various movements and changes which the battery plates undergo during' service.

An object ol this invention is to provide an improved protective envelop for battery platesl which is practically integral with the plate.

Another object ot' the invention its to provide an improved battery plate envelop 1which will eli'ectively prevent disintep'ration of the plates. y

Another object oli the invention is tio provide an improved battery plate envelop which Awill permit free circulation of the .p battery electrolyte; y

Another object of the invention is `to provide an improved process for formingr the batteryplaie envelops. f

lil-preferred embodiment of the improved envelop is illustrated in the accompanying drawings, in which: f`

Figure l is an elevation ot a pasted lead battery plate partially inelosed in the protective envelop, illustrating one step in the process. y

Fig, 2 is an elevation of the' lower tion of a plate illustrating step in the process.

Fig. 3 is an elevation of tery plate and por a subsequent a completed batii's protective envelop.

Specification of hitters-Patent.

ments employed `in coine together around the ends of the zinc patenten se.; es., rae.

ve. Renewed nay s, 1era. semina. aceras;

Fig. 4f is a bottom edgevview oi? the plate i illustrated in Fig. 3.

Figs. 5 and 6 .illustrate details of'elellforming thc'envelop. y Plates to Whliich the improved'protective envelop are tothe applied ere preferably slightly modified inthe process ot' manu facture. Fig. il illustrates a pasted lead plate 1, of any"` preferred type7 in which vertical channels 2 have been termed entirely through the plate, extending from the lower edge to a thereof. A l

The improved envelop in the firstfstage oli its formation comprises punchingrsy formed `from thin sheets et sott rubber, illustrated in Fie'. llClie central openings in these punchinp's are of suilicient sizeto plate with the the channels 2 and holding the opposite sides oiB the punehingsnugly againstthe plate. A thin .strip 5 ol? zinc, or other ma* terial which may be readily dissolved, is placed on each side of the plate between each two rubber punchings so that the plate is completely inclosed, as indicated on the upper portion oi' File. l. The strips 5 are shorter than the rubber punchinpgs and are only as wide as the side pieces ot' the rubber punchings, so that when the envelop is as-` sem'blcd,i adjacent soit rubber pieces will strips and at the cross-pieces ffl. as indicated 1n Fig. 1. The envelop is made oi sullicicnt thickness to extend the proper distanceon either side of the plate, depending upon they i 'i il() space required `i'or the separation ot the plates when they are assembled in a battery yar. y l l After the plate has been entirely inclosed in the envelop `of alternate soft rubber and. zine strips, the lower ends of the channels 2 are closed,r as indicated at 6 in Fi ,L 2, by any suitable recess, preferably y that known as lead Vurninggy. The plate is then treated to a vulcanizin process whereby the soft rubber is herdene thus leavin the plate etV this stage inclosed in` an enve op of alternate layers of hard` rubber and metallic zinc. f l ln order to make the plate electrically point near the upper edge lill,

lll enable the pnnchings to be slipped over the@ cross pieces 1i passing through 'lli ice

active and so Vthat there may be an even v'diffusion 'ofthe electrolyte, the plate is then Subjectedto an acid bath whereby the zinc is1 dissolved; thus leaving the envelop in the form of a hard 'rubber container provided with rectangular slits 7, as illustrated iii Fig. 3.

. Although indescribiiig this embodiment Lof-the invention reference has been made to 'ap'asted lead plate provided with channels,

f litfis lto be understood that the improved envelop may be applied to any other type of plate and that such plates may be piovided 'fvvitlichaniiels or may :be of standard construction without the channels.`

It isapparent also thatin place of the zinc,

any otlierinetal or material may be ein ployed which will perform the functions of separating the sheets of rubber until after they are vulcanized and which may then be removed by chemical or mechanical lse' ' l. A method ot' protecting battery plateswhicli consists iii inclosing a plate in a liaininated pile of thin sheets of sott rubber and ber envelop for the' plate.

vulcanizing the same to provide a hard rub- 2. A method ot' protecting battery plates Which consists in inclosing the plate in an envelop ofalteriiate thin sheets' ot' soft rubber and a substance soluble in acid arranged in planes at right angles to the surface of` vthe plate7 vulcanizing the rubber, andtreat- 'ing the completed plateto an acidv bath to dissolve the vsoluble substance.

3. A process of'forming a. slotted container for battery plates which consists in forming the container from va laminated mesmo pile of thin sheets of soft rubber and a spacing material, vulcanizing the same and removing tlie spacing material.

4. A method ot' protecting a battery plate which consists in slottiiig the battery plate, inclosing the plate in anenvelop of alternate thin sheet-s of pliable material with portions intertitting in the slots of the plate, andfa spacing material separating said sheets of pliable material, hardening thepliable material aiid removing the spacing material.

5. A. method of protecting a battery plate which consists in slotting said plate from one edge to a point adjacent the opposite edge, inclosing said plate in alternate -puncliiiigs ot soft rubber having integral projections passing through said slots, and strips ot' readily soluble substance, closing theopen ends of said slots, vulcanizing said soft rubber and dissolving said strips of soluble iiiateial.

6. A method ofprotecting a battery plate which-consists in slotting said plate from one edge to a point adjacenty the opposite edge. inclosing said plate in alternate punchings of sott rubber having integral projections passing through said slots, and strips of metallic zinc, closing the open ends of said slots, vulcanizing said sott rubber and treating said plate to an acid bath t0 dissolve said zinc.

7. The process of forn'iing a slotted container for battery plates which consists iii forming the container from a laminated pile of thin sheets of soft rubber and strips of metallic zinc intermediate said sheets, vulcanizing the same to 'harden the rubber and uniteptie rubber sheets around said zine strips, and treating said container to an acid bath to dissolve the zinc.

In witness whereof I have hereunto subscribed my namel in the presence' of two witnesses. v

CAMPBELL C. CARPENTER.

vWitnesses: Di A. ATKINS, W. L. Brass. 

